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在钳工工作中常碰到在原来螺孔体上面配盖板,一般用划线方法钻孔,这样,往往因划线误差引起废品,特别是大件、多孔更难掌握。用图示这种螺纹冲头可以解决问题,螺纹部分可根据工件螺孔定,注意60°顶尖应和螺纹部分保持同心,顶尖淬硬HRC60～63。工作时将螺纹部分旋在螺孔中,工作部分长短保持一致,一般不超过10毫米,再将需打孔工件放在上面,用鎯头一击即可得到
In fitter work often encountered in the original screw hole body with a cover, generally crossed the method of drilling, so often lead to scrap due to scribing errors, especially large, porous more difficult to master. Use the illustration of this thread punch can solve the problem, the thread part can be determined according to the workpiece screw hole, pay attention to the 60 ° top and the threaded part should be concentric, top hardened HRC60 ~ 63. Work thread part screwed in the screw hole, the working part of the length of the same, usually not more than 10 mm, and then need to punch the workpiece on top, with a head blow can get